StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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72 lines
1.6 KiB
72 lines
1.6 KiB
4 years ago
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"use strict"
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var robustScale = require("../robust-scale.js")
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var validate = require("validate-robust-sequence")
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var robustSum = require("robust-sum")
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var toFixed = require("robust-sequence-to-fixed-point")
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var tape = require("tape")
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var shuffle = require("shuffle-array")
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tape("sample cases", function(t) {
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t.same(robustScale([4], 2), [8])
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t.same(robustScale([1, 1e64], 2), [2, 2e64])
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t.same(robustScale([1], 1), [1])
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var s = robustScale([ -2.4707339790384e-144, -1.6401064715739963e-142, 2e-126 ], -10e-64)
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t.ok(validate(s))
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t.ok(s[s.length-1]<0)
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t.end()
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})
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tape("scalar", function(t) {
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for(var i=-50; i<50; ++i) {
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for(var j=-50; j<50; ++j) {
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t.same(robustScale([i], j), [i*j])
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}
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}
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t.end()
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})
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tape("sequences", function(t) {
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var sequences = [
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[0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9],
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[Math.random(), Math.random(), Math.random(), Math.random()],
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[1, 2, 1+Math.pow(2,-52), Math.pow(2, 100)]
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]
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var nseq = []
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for(var i=0; i<10; ++i) {
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nseq.push(2* Math.random() - 1)
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}
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sequences.push(nseq)
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function fpMult(a, b) {
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var p = a.mul(b)
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return p.ishrn(toFixed.DECIMAL_POINT)
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}
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function verifySequence(seq) {
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var s = toFixed(1)
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var r = [1]
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for(var i=0; i<seq.length; ++i) {
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var h = seq[i]
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r = robustScale(r, h)
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s = fpMult(s, toFixed(h))
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t.ok(validate(r), "check increasing and non-overlapping")
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t.equals(toFixed(r).toString(16), s.toString(16), "check result correct")
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}
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}
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for(var j=0; j<sequences.length; ++j) {
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var seq = sequences[j]
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verifySequence(seq)
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for(var j=0; j<10; ++j) {
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verifySequence(shuffle(seq))
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}
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}
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t.end()
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})
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